Core for casting iron pipes and means for producing the same



G. G. "BERRY. G RE-50R .CASYTINYGJRON PIPES AND MEANS FOR PRODUCING THE SAME.

APPLICATION EIL'ED APR.13. L921.

PatentdSept. 19,1922

3 SHEETSSHEET I.

I e. a. BERRY. CORE FOR CASTING IRON PIPES-AND MEANS FOR PRODUCING THE SAME.

APPLICATION FILED APR.13. i921.

1,429,562. P t nt ds pt- 19,1922.

3 SHEETSSHEET 2.

Ill.

Gite-away I CORE FOR CASTING IRON PIPES AND MEANS FOR PRODUCING THE SAME. A| PL|CATl0N FILED APR-n3. 1921.

1,429,5 2,, v Patented Sept. 19, 1922.

3 SHEETS-SHEET 3..

l w W & l N I l l o 1 2 i; o a Li 5' .6

Patented Sept. 19, 1922.

UNITE sTArs A e rormcE.

' GRANT e. BERRY, or :enssnmna, ALABAMA.

CORE roe CASTING IRON PIPES AND MEANS ron PRODUCING THE SAME.

Application filed April 13,

To all whom it may concern:

Be it known that 1, GRANT G. BERRY, a citizen of the United States, residing at Bessemer, in the county of Jefferson, State of Alabama, have invented certain new and useful Improvements in Cores for Casting Iron Pipes and Means for Producing the Same; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. I

The object of the invention is to provide an improved core for use in the manufacture of cast iron pipes and adapted for arrangement in the mold into which. the molten metal is poured, and a method of and machine for producing said core which, by reason of the characteristics of the object to be molded must be adapted to yield diametrically to permit of the contraction of the molten metal as the temperature thereof is reduced in the setting and cooling operation in order to avoid fractures in the completed product; and more especially to provide a casting core and method of and means for producing the same whereby the opera- 1 tion of preparing the same may be accomplished mechanically and under conditions serving to minimize the expenditure of time and labor while effecting a core of increased regularity and uniformity as a means of producing a pipe of uniform interior contour.

In the ordinary recognized practice in the production of cores for the purpose inclicated the core barrel which is usually of metal and consists of a suitable length of a tubular bar or unit is encased manually in a jacket of loose straw, excelsior, paper or like fibrous material of a more or less yielding or springy nature, suitably fastened around the core barrel and provided with a surface coating or scale of mud or wet clay or the like, so that when the core thus constructed is placed in the mold and the metal is poured into the latter around the core, the shrinkage of the metal, which is to form the cast iron pipe and which is necessarily incidental to the cooling of the metal, will be compensated for by the compression of the straw or fibrous jacket to avoid the straining of the casted metal and hence the tend- 1921. Serial No. 461,077.

ency to produce cracks or'fractures there- 1n. N ecessarlly such a procedure involves a considerable expenditure of time and re-.

smoothing or slicking the mud coating in order to approximate an interior uniformity,

of the manufactured article.

It is therefore the primary object ofthe present invention to provide a means for acketing or scaling the core barrel, in the product-ion of a core, which will. permit of the'operation being performed mechanically with regularity and without loss of time to the end that greater uniformity in the pro-. duction of pipes may be secured without involving any increased risk of fracture incident to the contraction of the metal in the cooling or setting thereof.

With these objects in view, the invention consists in a construction, combination and relation of parts ofwhicha preferred embodiment is illustrated in the accompanying drawing wherein: a j

Figure l is a plan view of an apparatus embodying the invention.

Figure 2 is a side view. of the same with the removable shield or guardwall partly broken away. Y

Figure 3 is a longitudinal sectional view showing the movable track elementsof the feeding mechanism in'their normal or o perative relation. with the carrier. A

Figure 4 is a horizontal section on the plane indicated by line 4-4 of Figure 3.

Figure 5 isa side elevation partlyin section upon the plane indicated by line 5-5 of Figure l. e I A. a

The machine embodies essentially a carrier adapted for receiving, supporting and ultimately delivering a core barrels which the application to thesurfaces of the core barrels of a'scale, having. the required resilience to permit of theshrinkage of the casted metal and provide a;proper interior surface of the product; with which carrier are associated means for depositingthe material forming the scale upon the exposed surfaces of the core barrels, means for feeding the core barrels to the carrier and including devices adapted for receiving the hot core barrels as they leave the casting pit, means for receiving the completed cores as they are delivered by the carrier, and means for maintaining the material constituting the scale in proper conditionto be deposited upon the surfaces of the core barrels. In the illustrated embodiment of the in- 'vention the carrier is of rotary form and includes the transversely'spa'ced' disks 10 mounted by means of a shaft 11 upon suit able bearing standards 1.2 andprovided with peripheral series of fingers13 of terminally hook shape. spaced to form seats let-for the respective reception of theterm-inals of the tubular core barrels 15 which are of ailength suflicient to span the interval between the disksor heads of the carrier and which'are secured against endwise movement by the guard ring 15 which are shown as attached to the outer surfaces of the series of fingers to close the outer ends ofthe seats interposed between the same. preferably, of forked or dual construction consisting of parallel corresponding elements arranged in transverse registration and spaced apart to provide guides for pivotal latches '16 which are mounted in planes between the said finger elements and are'preferably pivoted as at 17 for swinging movement, each latch preferably serving to close two adjacent seats and thereby lock the terminals of the core barrels against radial displacement during the interval be tween the charging of the carrier and the delivery of the completed cores. 1

It is the intention to rotate the carr'er at a relatively low rate of speed toprovide for the efficient application to the surfaces of the core barrels which are supported I thereby of the material forming the scale, as hereinafter explained, and to this end any suitable driving means may be employed in connection with the shaft 11 which i for purposes of illustration is provided witha pulley 18 for engagement by a belt 19 suitable foractuation by a motor of either the electric or other type (not shown), and

arranged in movable enclosing relation with the carrier 1s a shield or guard wall 20 adapted to be arranged in its operative position during the'coating or scaling 'of' the core barrels and to be displaced during the interval of loading and unloading the carrier, and to this end said shield or guard is constructed of sections 21 foldably con nected as by hinges 22 with the terminal sections of the walls extending at opposite sides of the plane of the carrier adapted to be foldedinwardly to occupy positions transverse to the carrier or parallel with the The fingers are axis thereof and having fastening means such as a latch 23 for engagement with a catch or keeper 24.

Beneath the carrier or in any preferred convenient relation thereto is arranged a pit 25 designed in the illustrated embodi- 'ment oftheinventionto serve as a reservoir or drippings from the carrier as the coating material is applied to the core barrels,

said coating consistingof a liquid or fluid mixture of clay, sand, water and a more or less finely ground fibrous material such as 'excelsior, hay or strawor the equivalent thereof, suchmiXture being sprayed upon the core barrels by a nozzle 28 connected with a conductor such as a hose 29 including a pumping mechanism 30 and designed to obtain its supply from the pit or mixing chamber.

Thus in carrying out the method of pro ducing cores, after the carrier has been loaded with the core barrels the mixture of scaling material is sprayed upon the surfaces of 'the barrels as the carrier is rotated to progressively present all portions ofthe surfaces of each core barrel in a common di-c rection or toward the point of discharge-of the coating material from the nozzle,the,

surplus material which does not at first adhereto the barrels dropping into the pit for remixture and subsequent use, and. the scattering or distribution of the niaterial being prevented by the shield or guard wall which during the is closed around the carrier spraying operation.

As the core barrels are usually presented to and taken up by the carrier while in a heated condition soon after leaving the casting pit in which they have served their pur-,

purpose in the casting of previous pipes. it is obvious that the liquid vehicle of the fibrous and earthy ingredients of the scale will be rapidly evaporated so as to leave the solid materials in the form of a scale or coating on the surface of the core barrels, and by continuing the application of the fluid material during the relatively slow rotation of the carrier, this coating or jacket -may be made of any desired thickness to provide for any desired interior diameter of the pipes to be cast around the same as a lOO core, and after a sufficient thickness of the coating or jacket has been deposited the completed cores may be discharged from the carrier to vbe subsequently slicked or superficially smoothed (if necessary) and further dried by passing the same through a suitable drying chamber (not shown) preparatory to being conveyed to the casting pit and inserted respectively in the molds in which the pipe sections are to be cast. Such operations of slicking or smoothing and supple mental drying form no part of the present invention andare of relatively negligible importance in view of the fact that the uniform and progressive presentation of the surfaces of the core barrels to the depositing medium through which the plastic .or semiliquid scaling material is applied to the core barrels, serves to insure a, comparatively even or uniform distribution of the material upon the surfaces of the score barrels and hence a practically uniform construction and diameter of the cores without resorting to subsequent treatment, which, however, is.

an indispensable and important feature of the present method of preparing the cores for this purpose.

The means for feeding the core barrelsto the carrier in the operation of loading the latter embodies a horse 29 consisting of parallel laterally spaced pairs of guide rails 30 between which are arrangedthe supporting rails 31 mounted on cushioning springs 32 to adapt them-to yield asthe hot core barrels arevthrown thereon on their return from the casting pit, said supporting rails being provided at their outer ends with suit able upstanding stops 33 to, prevent the pipes from rolling in the wrong direction and dropping from the horse with the attendant risk of breakage which is important in view of the relative cost of these core barrels. The supporting rails are preferably pivoted at their inner ends as indicated at 3%, to the end that the cushioning springs serve to maintain the rails in a downwardly inclined position, serving to feed the core barrels toward the carrier, and in communication withv and adapted to receive the core barrels from the horse are the rail elements 35 pivoted as at 36 to permit oftheir being elevated .at their inner ends and thereby removed from operative relation with the core barrel, are presented 1n direct opposicarrier after the loading operation of the latter has been completed. ments during the loading operation extend terminally between the planes of the disks or heads forming the side members of. the carrier and are provided with terminal stops 3?, to prevent the core barrels from rolling from the same at their inner ends, and the pick-up fingers of the carrier-overlap or move in intercurrent relation with the inner terminals of the rail elements so as to engage.

the extremities of the core barrels and bythe continued rotation of the carrier roll: said These rail elethe fingers and are locked by the closing of I the latches. The latches in turn are secured in place by transverse locking pins 38 which are-subsequently removable by an attendant,

as the latches are successively presented at the discharge side of the carrier to permit of the deposit of the completed or jacketed cores upon the delivery rack 39 consisting of parallel rails 40 from which they may be removed by truck or otherwise to be conveyed either directly to the casting pit or inter-' mittently to such supplemental drying means as may be required to insure the necessary solidity ofthe. scale or jacketing material. I

The composition of the scale ashereinbefore indicated is such as to afl'orda substantially' yielding quality adapting the same to compression incidental'tothe contraction of the metal used in casting the product, andas in the present practice the corebarrels may be withdraw-n from the molds and used repeatedly after the cast metalhas been reduced in temperaturesufficiently to. become set, it being only necessary, as will be under stood, to pass said core barrels through-the jacketing or scaling machine in order to prepare them for I subsequent use.

One of the important features of the 'struc eting material upon the surfaces of all of the core barrels may be effected. The spray encounters the outer surfaces of the core bar-" rels at the upper side'of the carrier and the inner surfaces of the core barrels at the lower side of the carrier, and as the carrier turns those barrels which were at the'bottom or lower side of the carrier are gradually turned to the top or under side to present one side and then the other side, progressively'so that all portions of'the surface of each and every tion to the line of movement of the spray supplied from above the carrier.

VVhat' is claimed is: I v 1. A machine for producing cores f us incasting pipes, having a rotary core barrel carrying member and "a spraying member" for applying fluid scale forming material to the core barrels, said carrying member he ingvcontinuously movable to progressively and uniformly apply the material to the exterior surfaces of thecore barrels.

2. A. machine for producing cores for use carrying, member and a spraying. member vin casting pipes, having a rotary core barrel i for applying fluid scale forming materialto the core barre-ls, said carrying member being.

continuously-movable to progressively. and

uniformly apply the material to the exterior surfaces of the core barrels, the spraying member being located exteriorly of the path of the corebarrels.

3. A machine for producing'core's for use in the manufacture of cast iron pipes, having a carrier for receiving core barrels and delivering the completed cores,jand means for making progressive application of a fluid scale forming material to the core barrels, the carrier being rotary-and having an annular series of seats for the reception'ofth'e' core barrels.

LA machine for producing cores-for use in the manufacture of cast iron pipes, having a carrier for receiving core barrels and deliverlng the completed cores, and means for making progressive application of a fluid scale forming; material to the core barrels, the carrier consisting of parallel rotary disks or heads having seats for the reception of the extremities of the core barrels'and plckup fingers for successively engaging and,"

directing the core barrels into said seats.

5. A machlne for producing cores for use 1n the manufacture of cast iron pipes, havainga-carrier for receiving core barrels-and delivering the completed cores, and means for makingprogressive application'of a fluid scale forming material to the core barrels, the carrier consisting of parallel rotary disks or heads having seats for the receptionof the extremities of the core barrels andfinge'rs for engaging and directing the core barrels into said seats, in combination with core barrel feeding means having barrel supporting,

rails to conduct the same to "said fingers;

6. A machine for producing cores for use in the manufacture of cast iron pipes, hav-- ing a rotary carrier for receiving corebarrelsand delivering the completed cores, and

means for making progressive: application of a fluid scale forming material to the core barrels,v the carrier consisting of parallel disks or heads having peripheral seats for the reception of the extremities of the core barrels and latches for securing the core barrels in said seats.

7 A machine for producing cores for use in the manufacture of cast iron pipes, having a rotary carrier for receiving-core barrels and delivering the completed cores, and

means for making progressive:application' of a fluid scale forming'material to the core barrels, the carrier consisting of spaced disks having peripheral seats for the reception of the terminals of the core barrels, and pivotal seatspanning latches for locking the core barrels against displacement.

8. A machine for producing cores-for use in the manufacture of cast iron pipes, having a carrier for receiving core barrels and delivering the completed" cores, and means for making progresslve application of a. fluid scale forming material to the core barrels,

the carrier consisting of spaced rotarydis'ks having. seats forthe reception of the terminals of thecore barrels, andpivotal latches for locking'the core barrels in said seats, each latch being arranged to close a plurality. of seats.

9. A machine for producing cores for use in the manufacture of cast iron pipes, having a rotary carrier'for receiving core barrels and delivering the completed cores,-and

means for making. progressive application of a fluid scale forming material to the core barrels, the carrier consisting of terminal spaced disks having peripheral seats for the reception of the terminals of the core barrels,

pivotal latches for respectively lockingv a having'av carrier for receiving core barrelsand delivering the completed cores," and" means for making progressive applicationof a fluid scaleforming' material to the core barrels, a foldable shield or guard being'arranged in enclosing relation With the carrier and consisting of hingedly connected sections of which the terminal members-are adapted for arrangement substantially parallel with the axis'of the carrier.

12. A machine for producing cores for'use in the'manufacture of cast iron pipes, havinga carrier for receiving core barrels and delivering completed cores, and means for making progressive application of' a fluid scale forming material to the core barrels,

the carrier consisting ofspacedrotary "heads having pick-up fingers for respectively engaging the core-barrels, aguard or shield for enclosing the carrier and having terminal sections for arrangement parallel'with the axis of the carrier, and a feeding means having pivotally mounted rails for arrangement terminally in intercurrent relation With the pickup fingers. v

13. A machine for producing cores for use in the manufacture of cast iron pipes, having a carrier for receiving core barrels and delivering the completed cores, and

means for'making progressive application of a fluid scale forming material to the core barrels, the carrier being of rotary constructlon and having seats for the reception of the terminals of the core barrels in combination with core barrel feeding means consisting of a horse having cushioned supporting rails, and connected guide rails for conducting the core barrels to the carrier.

14. A machine for producing cores for use in the manufacture of cast iron pipes, having a carrier for receiving core barrels and delivering the completed cores, and means for making progressive application of a fluid scale forming material to the core barrels, the carrier being of rotary construction and having seats for the reception of the terminals of the core barrels, in combination with core barrel feeding means consisting of 15 a horse having cushioned supportin rails, and connected guide rails for conducting the core barrels to the carrier, said horse having pairs of parallel guide rails between which the cushioned supporting for oscillatory movement.

In testimony whereof, I aifix my signature, in the presence of two witnesses.

GRANT G. BERRY.

Witnesses:

WM. C. SMITHSON, C. E. HAWKINS.

rails are mounted 20 

